What is CVE-2026-45849?

CVE-2026-45849 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.1.107 onward and patched in 6.1.165, 6.6.128, 6.12.75 and others. CVE-2026-45849 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-45849?

CVE-2026-45849 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-45849?

Yes, CVE-2026-45849 has been patched. Fixed versions include 6.1.165, 6.6.128, 6.12.75 and others. If you are running Linux kernel 6.1.107 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-45849 actively exploited?

CVE-2026-45849 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-45849

In the Linux kernel, the following vulnerability has been resolved: net: mscc: ocelot: add missing lock protection in ocelot_port_xmit_inj() ocelot_port_xmit_inj() calls ocelot_can_inject() and ocelot_port_inject_frame() without holding the injection group lock. Both functions contain lockdep_assert_held() for the injection lock, and the correct caller felix_port_deferred_xmit() properly acquires the lock using ocelot_lock_inj_grp() before calling these functions. Add ocelot_lock_inj_grp()/ocelot_unlock_inj_grp() around the register injection path to fix the missing lock protection. The FDMA path is not affected as it uses its own locking mechanism.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-05-27

Patch available

Yes

Affected versions

Linux kernel versions 6.1.107, 6.6.48, 6.10.7, 6.11 and later are affected. Fixed in 6.1.165, 6.6.128, 6.12.75, 6.18.14, 6.19.4, 7.0 and their respective stable series.

Affected from

≥ 6.1.107 ≥ 6.6.48 ≥ 6.10.7 ≥ 6.11

Fixed in

✓ 6.1.165 6.1.x ✓ 6.6.128 6.6.x ✓ 6.12.75 6.12.x ✓ 6.18.14 6.18.x ✓ 6.19.4 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-45849 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/026f6513c5880c2c89e38ad66bbec2868f978605
Patch
Kernel patch commit
https://git.kernel.org/stable/c/0b217a40156f497e09dd20d3f7baec40c785f386
Patch
Kernel patch commit
https://git.kernel.org/stable/c/51c32ae7fae14552d79f7139614b77c1bbd57a48
Patch

6 patch commits total View all on NVD

Frequently asked questions

What is CVE-2026-45849?

CVE-2026-45849 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.1.107 onward and has been patched in 6.1.165, 6.6.128, 6.12.75 and others. CVE-2026-45849 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-45849?

Yes — CVE-2026-45849 has been patched. Fixed versions include 6.1.165, 6.6.128, 6.12.75 and others. If you are running Linux kernel 6.1.107 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-45849 actively exploited?

No — CVE-2026-45849 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.